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Introduce a way to directly save snapshot functions and load them back (#2043)

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Added two new api functions:
* jerry_parse_and_save_function_snapshot
* jerry_load_function_snapshot_at

The jerry_parse_and_save_function_snapshot function allows
creating snapshots from snapshot arguments and body source.

The jerry_load_function_snapshot_at function enables loading
back functions from a given snapshot as a JS function object.

JerryScript-DCO-1.0-Signed-off-by: Peter Gal pgal.u-szeged@partner.samsung.com
This commit is contained in:
Péter Gál
2017-10-18 15:03:54 +02:00
committed by László Langó
parent d0143adc82
commit 6d988afbf4
4 changed files with 375 additions and 26 deletions
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tests/unit-core/test-snapshot.c
+58
View File
@@ -23,6 +23,62 @@
*/
#define SNAPSHOT_BUFFER_SIZE (256)
static void test_function_snapshot (void)
{
/* function to snapshot */
if (!jerry_is_feature_enabled (JERRY_FEATURE_SNAPSHOT_SAVE)
|| !jerry_is_feature_enabled (JERRY_FEATURE_SNAPSHOT_EXEC))
{
return;
}
const jerry_init_flag_t flags = JERRY_INIT_EMPTY;
static uint32_t function_snapshot_buffer[SNAPSHOT_BUFFER_SIZE];
const char *args_p = "a, b";
const char *code_to_snapshot_p = "return a + b";
jerry_init (flags);
size_t function_snapshot_size = jerry_parse_and_save_function_snapshot ((jerry_char_t *) code_to_snapshot_p,
strlen (code_to_snapshot_p),
(jerry_char_t *) args_p,
strlen (args_p),
false,
function_snapshot_buffer,
SNAPSHOT_BUFFER_SIZE);
TEST_ASSERT (function_snapshot_size != 0);
jerry_cleanup ();
jerry_init (flags);
jerry_value_t function_obj = jerry_load_function_snapshot_at (function_snapshot_buffer,
function_snapshot_size,
0,
false);
TEST_ASSERT (!jerry_value_has_error_flag (function_obj));
TEST_ASSERT (jerry_value_is_function (function_obj));
jerry_value_t this_val = jerry_create_undefined ();
jerry_value_t args[2];
args[0] = jerry_create_number (1.0);
args[1] = jerry_create_number (2.0);
jerry_value_t res = jerry_call_function (function_obj, this_val, args, 2);
TEST_ASSERT (!jerry_value_has_error_flag (res));
TEST_ASSERT (jerry_value_is_number (res));
double num = jerry_get_number_value (res);
TEST_ASSERT (num == 3);
jerry_release_value (args[0]);
jerry_release_value (args[1]);
jerry_release_value (res);
jerry_release_value (function_obj);
jerry_cleanup ();
} /* test_function_snapshot */
int
main (void)
{
@@ -212,5 +268,7 @@ main (void)
jerry_cleanup ();
}
test_function_snapshot ();
return 0;
} /* main */